Replace O2 Sensor?

[M100Brisbane]

Hullo to any O2 Sensor gurus out there.

Had a Code 13 fault a few days ago that seems now to be clear - I cleaned up the plug pins.

However, this meant that I had to think about the O2 sensor itself. I looks like a previous owner has spliced in a incorrect sensor - have a look at the photo.

Question is, should I swap in a correct one?

Elan scan data (idling, cold start on a warm spring day here in sunny Qld) is saying 128, what ever that means,

Time s 0.108000194
Prom id 1499
Faults 0
Time s 0.108000194
Engine run time s 12
Distance miles 0
TPS voltage V 0.4
Throttle % 0
Gear 0
Engine speed RPM 1225
Speed mph 0
Smoothed speed mph 0
Calc. speed mph 0
Acceleration g 0
Power horsepower 0
Barometer bar 1.00158
Boost bar 0
Manifold press (abs). bar 0.41583
Injector pulse width ms 2.311706543
Injector duty % 2.359867096
Spark advance ° 8.7890625
Coolant temp. °C 38
MAT °C 31.18
CO potentiometer/Oxygen sensor? V 2.156862745
Oxygen sensor (integrator)? 128
IAC position 44
Target idle RPM 1175
Battery volts V 14
Oxygen sensor (integrator)? 128
Air/fuel ratio 13.9
DRP interval ms 24.44652
Voltage comp.? V 2.4
Wastegate duty cycle? % 0
Knock counter 0
Knock retard ° 0
Op. temp.- temp. °C 26
Coolant raw 73

[chrism]

Michael I bought a Bosch O2 sensor from the US when I thought I had problems (actually I'd de-pinned further down...) and the lead wasn't long enough. I rather naively returned it and got $10 back for it - postage consumed the rest

What I could have done was to graft some more wiring onto it - like yours seems to have done - but heigh-ho we live and learn. There's a thread on LEC somewhere where I made a point of listing a couple of O2 sensors that had the correct lead length. From the top of my head the Denso, Walker and Bosch 15701 'qualify'...

Regarding your EScan, instantaneous results a moment after start up won't really give much info (especially with O2 sensors).

With respect, I think you need to zip and send a (say) 5min warm-up log or a run around the block, for example. I think I'd be looking to see if your O2 sensor 'warms up' and varies with time between ~0.1V and ~0.8V which you'd get from a graph like this:-

[Tuga2112]

Michael I bought a Bosch O2 sensor from the US when I thought I had problems (actually I'd de-pinned further down...) and the lead wasn't long enough. I rather naively returned it and got $10 back for it - postage consumed the rest

What I could have done was to graft some more wiring onto it - like yours seems to have done - but heigh-ho we live and learn. There's a thread on LEC somewhere where I made a point of listing a couple of O2 sensors that had the correct lead length. From the top of my head the Denso, Walker and Bosch 15701 'qualify'...

Regarding your EScan, instantaneous results a moment after start up won't really give much info (especially with O2 sensors).

With respect, I think you need to zip and send a (say) 5min warm-up log or a run around the block, for example. I think I'd be looking to see if your O2 sensor 'warms up' and varies with time between ~0.1V and ~0.8V which you'd get from a graph like this:-

you certainly are becoming very knowledgable when it comes to closed loop topic

[chrism]

...yeah got the scars to prove it...
(But my therapist says I'm making progress now.)

[RonR]

Question is, should I swap in a correct one?

Elan scan data (idling, cold start on a warm spring day here in sunny Qld) is saying 128, what ever that means,

CO potentiometer/Oxygen sensor? V 2.156862745

Hi Michael,

Looks like you're using the old 'M100 ALDL protocol.ini' file, which gives a misleading (wrong!) voltage for the Oxygen Sensor. I've played with your figure above to get the real voltage of 484mV, which is in the right ball-park for an O2 sensor just after staring up. If you want to see the correct figure in your scans, please follow the instructions HERE.

As said above, a scan of the first few minutes of warm-up should give you the info on whether the sensor's OK.

EDIT: To get the correct voltage take your 2.1568 above and multiply by 224.4, which gives you the actual voltage of 484 in mV.